To understand global warming (enhanced greenhouse effect) it is essential to understand the basic physics of the greenhouse effect, because global warming is the enhanced greenhouse effect. The effect of atmospheric GHGs is like a greenhouse but the science is different.

​​Greenhouse gases in the lower atmosphere in fact are active tiny heat radiators, so the more there are and the longer they last in the atmosphere- the more the warming. They add heat to the lower atmosphere which warms the surface of the planet.

Climate science has till recently deferred the global warming effect of a GHG over a 100 year time horizon, but ​​a 20 year period is now also published and is more accurate.